| Clue | Source | Date |
|---|---|---|
| System of organization that might have accessibility issues | ||
| Sort on a spectrum | ||
| Sort into a spectrum? | ||
| System with shades of meaning | LA Times Daily | 06 Aug 2022 |
| The National Weather Service has one for storm severity | New York Times | 27 Dec 2019 |
| The National Weather Service has one for storm severity |